Because in a duopoly, both parties collude to stifle competition-Pepsi/Coke
This explains in better than I can in a short post
Link: https://freakonomics.com/podcast/why-dont-we-have-better-candidates-for-president/
This explains in better than I can in a short post
Link: https://freakonomics.com/podcast/why-dont-we-have-better-candidates-for-president/